I'm working more in AE this year and noticing substantial use of CPU and RAM resources when not using AE, coming to realize it is the "cache frames when idle" feature.
That's great, but it is stealing power from other applications so I propose we get a way to globally disable that feature and only cache the comps we want to cache, or at least an easier way to disable per comp.
If you have many comps it's not ideal but an visual icon that represents this feature is on would be great, either in the Project panel (like the icon that indicates a proxy) or in the Composition view panel